diff --git a/src/main/java/com/cool/hot100/matrix/Num240.java b/src/main/java/com/cool/hot100/matrix/Num240.java
new file mode 100644
index 0000000..a871604
--- /dev/null
+++ b/src/main/java/com/cool/hot100/matrix/Num240.java
@@ -0,0 +1,33 @@
+package com.cool.hot100.matrix;
+
+/**
+ * Created with IntelliJ IDEA.
+ *
+ * @Author: Cool
+ * @Date: 2024/09/09/09:08
+ * DayNumber 1
+ * Hard 2
+ * Level ?
+ */
+public class Num240 {
+
+    public boolean searchMatrix(int[][] matrix, int target) {
+        if (matrix.length == 0) {
+            return false;
+        }
+        int colLen = matrix[0].length;
+        int len = matrix.length;
+        int col = colLen - 1;
+        int row = 0;
+        while (col >= 0 && row < len) {
+            if (matrix[row][col] == target) {
+                return true;
+            } else if (matrix[row][col] < target) {
+                row++;
+            } else {
+                col--;
+            }
+        }
+        return false;
+    }
+}